== Linux Tricks ==

==== Search Files ====
To search files of a specified name (//mysearchterm//) in the path, use:
  $ locate mysearchterm

Or do a comprehensive search for all files irrespective if they are in the path, use:
  $ find / -name mysearchterm

To search a term in files, use ''grep'' instead:
  $ grep -r -e mysearchterm *

==== Testing an open ssh port ====
To find out any open ''ssh'' ports online, use ''nmap''. It can be used to verify that a firewall is not blocking ''ssh'', when troubleshooting connectivity issues in a host.

''nmap'' has an option to ignore the host lookup, and generate a list of open ''ssh'' ports. The command is:
    nmap -P0 -sS -p 22 72.32.103.0/24 
where:
| -P0 | Ignore host lookup. |
| -sS | SYN type connect test. |
| -p //portnumber//  | Specify port. |

==== Disk Usage / Free ====
To see disk usage for current directory:
  $ du -h
  
To see disk free:
  $ df -h